American Journal of Mechanical Engineering
ISSN (Print): 2328-4102 ISSN (Online): 2328-4110 Website: http://www.sciepub.com/journal/ajme Editor-in-chief: Kambiz Ebrahimi, Dr. SRINIVASA VENKATESHAPPA CHIKKOL
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American Journal of Mechanical Engineering. 2019, 7(3), 146-150
DOI: 10.12691/ajme-7-3-5
Open AccessArticle

Study Various Defects of Ball Bearings through Different Vibration Techniques

Nouby M. Ghazaly1, , G. T. Abd el- Jaber1 and Nadica Stojanovic2

1Mechanical Engineering Department, Faculty of Engineering, South Valley University, Qena-83521, Egypt

2University of Kragujevac, Faculty of Engineering, 6 Sestre Janjić STR., 34000 Kragujevac, Serbia

Pub. Date: September 22, 2019

Cite this paper:
Nouby M. Ghazaly, G. T. Abd el- Jaber and Nadica Stojanovic. Study Various Defects of Ball Bearings through Different Vibration Techniques. American Journal of Mechanical Engineering. 2019; 7(3):146-150. doi: 10.12691/ajme-7-3-5

Abstract

The main objective of this study is to evaluate ball bearing defects under different operation conditions through vibration measurements. There are several tests conducted for healthy and defective bearing under variable speeds and load conditions. Experimental tests are conducted for six sets of ball bearings. Initially, a good bearing is fastened in the test rig and vibration signals are measured using the FFT analyzer to show the base-line performance of a healthy bearing. Then, the good bearing is exchanged by defective bearing and vibration signals are measured for each case separately under the same operation condition. Frequency domain, time domain and root-mean-square are used to describe various bearing defects. The experimental results are showed that each one of these methods is useful to identify the bearing problems. Also, the results proved that the significant variation in the root-mean-square at different rotational speed.

Keywords:
condition monitoring defective bearing time domain frequency domain analysis root-mean-square

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